Abdominal exercise device



FIG. 1 is a front and top perspective view of an abdominal exercise device, showing my new design;

FIG. 2 is a rear and bottom perspective view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a right side elevation view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom plan view thereof;

FIG. 9 is an enlarged view of a portion indicated with numeric 9 in FIG. 1; and,

FIG. 10 is an enlarged view of a portion indicated with numeric 10 in FIG. 2.

The dashed lines in the figures illustrate portions of the abdominal exercise device that form no part of the claimed design. The dash dot dash lines in FIGS. 1, 2, 9 and 10 are for the purpose of depicting the boundary lines of the enlarged views and form no part of the claimed design. 

CLAIM The ornamental design for an abdominal exercise device, as shown and described. 